1 files changed, 43 insertions, 0 deletions
diff --git a/2024/06/rust/src/main.rs b/2024/06/rust/src/main.rs
new file mode 100644
index 0000000..92ac02d
--- /dev/null
+++ b/2024/06/rust/src/main.rs
@@ -0,0 +1,43 @@
+use std::io;
+
+use aoc::grid::{Direction, Grid};
+use std::collections::HashSet;
+
+fn main() -> io::Result<()> {
+    let grid: Vec<Vec<char>> = io::stdin()
+        .lines()
+        .map(|line| line.unwrap().chars().collect())
+        .collect();
+    let grid = Grid::new(grid);
+    let start = grid
+        .enumerate()
+        .filter(|(_, c)| **c == '^')
+        .next()
+        .unwrap()
+        .0;
+
+    let silver: usize = silver(&grid, start);
+    let gold: usize = gold(&grid);
+    println!("silver: {silver}");
+    println!("gold: {gold}");
+
+    return Ok(());
+}
+
+fn silver(grid: &Grid<char>, start: (usize, usize)) -> usize {
+    let mut pos = start;
+    let mut dir = Direction { x: 0, y: -1 };
+    let mut seen = HashSet::<(usize, usize)>::new();
+    loop {
+        seen.insert(pos);
+        match grid.move_pos(pos, dir, 1).and_then(|p| grid.at(p)) {
+            Some(&'#') => dir = dir.cw(),
+            Some(_) => pos = grid.move_pos(pos, dir, 1).unwrap(),
+            None => break seen.len(),
+        }
+    }
+}
+
+fn gold(grid: &Grid<char>) -> usize {
+    0
+}